The 6th (Inniskilling) Dragoons was a cavalry regiment in the British Army, first raised in 1689 as Sir Albert Cunningham's Regiment of Dragoons. One of the regiment's most notable battles was the Battle of the Boyne in July 1690. It became the 6th (Inniskilling) Regiment of Dragoons in 1751. The regiment also fought with distinction in the Charge of the Union Brigade at the Battle of Waterloo and again as part of the successful Charge of the Heavy Brigade against superior numbers at the Battle of Balaclava during the Crimean War. The First World War sounded the death knell for mounted cavalry as it became apparent that technology had moved forward with greater destructive power and made horsed cavalry redundant on the modern battlefield. The British Army reorganised and reduced its cavalry corps by disbanding or amalgamating many of its famous cavalry regiments. The Inniskillings was one of those affected. It saw service for two centuries, including the First World War, before being amalgamated with 5th Dragoon Guards to form 5th/6th Dragoons in 1922.

There are 13 cavalry Regiments of the British Army each with its own unique cap badge, regimental traditions, and history. Of the currently nine regular cavalry regiments, two serve as armoured regiments, three as armoured cavalry regiments, three as light cavalry, and one as a mounted ceremonial regiment. There are also four yeomanry regiments of the Army Reserve, of these, three serve as light cavalry and one as an armoured regiment. Each yeomanry light cavalry unit has been paired with a regular unit of the same role, the armoured yeomanry unit is paired with the two regular armoured units. All except the Household Cavalry are part of the British Army's Royal Armoured Corps.